Loom shedding mechanism.



.1. w. PLATT. LOUM SHEDDING MECHANISM.

(Applicntion filed Feb. 27, 1901.)

Patented Jan. 7, "902.

(No Model.)

4 Sheets- Sheet I.

INVENTU R? 2 Mf No. 690,873. Patented Jan. 7, I902.

J. W. PLATT.

LOOM SHEDDING MECHANISM.

(Application filed Feb. 27, 1901. (No Model.) 4 SheetsSheet 2,

No. 690,373. Patented Ian. 7,1902.

J. w. PLATT.

LUUM SHEDDING MECHANISM.

(Application filed Feb. 27, 1901.)

(No Model.)

4 Sheets-Sheet 3.

\x/wN ssss; INVENTEIR? No. 690,873. Patented Jan. 7, 1902.

.1. w. PLATT.

LOOM SHEDDING MECHANISM.

(Application filed Feb. 27, 1901.) (No Model.) 4 Sheets-Sheet 4.

ia/Ma W422 Tn pm: PETERS 00.. moroumo" msummown. c,

by a separate pattern-chain 4.

NITED STATES PATENT FFICE.

JOHN WALTER PLATT, OF DOVER, NEW HAMPSHIRE.

LOOlVl SHEDDING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 690,873, dated January7, 1902. Application filed February 27, 1901. Serial No. 49,028. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, JOHN WALTER PLATT, of Dover,in the county ofStrafford and State of New Hampshire, have invented certain new anduseful Improvements in Loom-Shedding-Mechanism Stop-Motions, of whichthe following is a specification.

This invention relates to shedding mechanism for looms; and its objectis to provide a stopmotion for arresting a pattern-chain when the latterbecomes displaced. The invention relates wholly to the pattern-chain andits propelling mechanism, and the particular form of shedding mechanism,dobby, jacquard, or shuttle-controller to which it shall be applied, aswell as the particular form of chain, is immaterial.

In the accompanying drawings 1 have illustrated the invention asembodied in a wellknown form of loom-dobby, to which, however, it is inno wise confined.

Figure 1 represents a left-hand elevation of the dobby. Fig. 2represents a front elevation. of the pattern-cylinder. Fig. 4 representsa detail side elevation, partly broken away, of the parts which includethe invention. Fig. 5 represents a section showing the opposite side ofsaid parts. Fig. 6 represents a similar section showing the parts inanother position. Fig. 7 represents a detail section and elevationlooking from the right of the chain-pro- .pellin g gears and adjacentparts. Fig. 8 represents a front elevation of said parts. Fig. 9represents a front elevationof the parts in another position. Figs. 10,11, and 12 represent sectional views of said parts, illustratingdifferent positions of the gear-locking key. Fig. 13 represents asection on the line 13 13 of Fig. 9. Fig. 14 represents a section on theline 14 14 of Fig. 9. Fig. 15 represents a detail perspective view ofthe key.

The same reference characters indicate the same parts in all of thefigures.

Referring to the drawings, 1 1 represent a series of harness-leverscontrolled by a pattern-chain 2, and 3 3 represent a separate series oflovers which may operate a shuttlechanging mechanism and which arecontrolled These chains are mounted upon pattern-cylinders 5 6, se curedto a shaft 7, and they are made up of Fig. 3 represents a section on theshaft a series of flexibly-connected bars or rods 8 8, on which rollers9 9 are arranged in accordance with the pattern of the cloth, therollers and the spaces between them acting as selectors. Above thepattern-cylinders 5 6 are mounted a series of pivoted jacks 10 10, whichoperate as feelers and coact with the selectors on the pattern-chain ina well-known manner. V The intermediate mechanism whereby the jacks 10act upon the levers 1 3 need not be described, as it forms no part of myinvention and may be varied at pleasure. The ends of thepattern-cylinders are provided with sprocket-wheels 11 12, between theteeth of which the bars 8 of the pattern-chains rest as the chains passover the cylinders. Those portions of the bars which engage thesprocket-wheels are unprovided with selectors.

It frequently happens in shedding mechanism of this and a similarcharacter that the bars or lags of the patternchains will be bunched orthe chain will kink or becomedisplaced upon the cylinder, wherebyderangement ofthe dobby mechanism is often occasioned, necessitatingstoppage of the loom and repairs or causing bad places in the cloth,which losses and others due to this cause it would be an advantage toobviate. Such a result I accomplish with the following mechanism.

13 is a large gear fast to the shaft 7 of the pattern-cylinders, and 14is a driving-shaft constantly rotated in one direction. On the shaft 14are two loose gears 15 16, of which the former meshes with gear 13. On ashort fixed counter-shaft or stud 17 are two gears 18 19, fixedtogether, the former meshing with gear 13 and the latter with gear 16.Should the gear 15 be fixed to the shaft 14 and the gear 16 loosethereon, the pattern-cylinder shaft 7 will be rotated in its normal orforward chain-propelling direction by the motion of the shaft 14,transmitted through gear 15 to gear 13. Should the gear 16 be fast tothe shaft 14 and the gear 15 loose thereon, the shaft 14 will operatethrough gears 16, 19, and 18 on the gear 13 to rotate thepatterncylinder shaft in the reverse direction.

20 is a flat key slidingly mounted in a slot in shaft 14, so as torotate therewith, and having a projection 21, adapted to engage asliding rod 36.

radial key-slots 22 23 in the respective gears 16. The key has threepositions. (Represented in Figs. 10, 11, and 12.) In one extremeposition (shown in Fig. 10) its projection 21 occupies slot 22 andconnects gear 15 to the shaft 14, gear 16 being then disconnected. Inthe other extreme position (shown in Fig. 12) projection 21 occupiesslot 23 and connects gear 16 to shaft 14, the gear 15 being thendisconnected. In the intermediate position of the key (shown in Fig. 11)projection 21 occupies an annular space or chamber 24, formed byrecessing the opposed faces of the two gears, and both gears are thendisconnectedfrom the shaft.

25 is a collar fast to the shaft 14 and having a cam-recess 26.

27 is a sleeve loose on shaft 14 and having a cam-tooth 28, adapted toenter the recess 26. The end of sleeve 27 engages a knob or handle 29 onthe end of key 20 and is adapted to move said key outwardly when thesleeve is displaced outwardly.

30 is an arresting-dog affixed to a short shaft 31 and adapted to haveits free end moved by the oscillation of said shaft into or out of thepath of a series of teeth 32 32, formed on sleeve 27. The shaft 31 hasalso affixed to it an arm or plate 33, engaged by sleeve 27, whereby thelatter when moved outwardly carries with it the shaft 31, which ismounted to slide longitudinally in a bearing 34. This keeps thearresting-dog 30 in register with the teeth 32. A spring 46 tends tohold the shaft 31 in its inward position. Also affixed to shaft 31 is ashort arm or Wrist 35, connected with the inner or lower end of Thelatter is formed at its outer end with a slot 37, occupied by a shaft orstud 38, whereby the rod is guided in its longitudinal movements,and isprovided with two pins 39 39, engaged by a cam member 40, fixed to shaft38. This cam is provided with raised portions 41 42 and recesses 43 44on its opposite ends, with which the pins 39 engage. When the pins areengaged by the projection 42 and the recess 43, as shown in Figs. 1 and5, the rod 36 will be moved inwardly, so as to bring the end of dog 30out of the path of the teeth 32 on sleeve 27. When the projection 41 andthe recess 44 engage the pins 39, the dog will be moved in an oppositedirection into the path of said teeth. Also fixed to shaft 38 are aseries of arms or fingers 45, whose free ends overlie thesprocket-wheels 11 12. The arms 45 are here shown as three in number,two for the large chain 2 and one for the small chain 4. During thenormal operation of the dobby the ends of the arms 45 rest on or nearthe peripheries of the sprocket-wheels 11 12, between the teeth of whichthe bars 8 8 of the chains are lodged, and the cam and dog 30 have thepositions represented in Figs. 1 and 5, the dog 30 being out of the pathof the teeth on sleeve 27 and the projection 28 being lodged in therecess 26, as shown in Fig. 8.

The key 20 will then be engaged with gear 15 and the pattern-chains willbe rotated in a forward direction. If for any reason the chains becomeradially displaced on the pattern-cylinders, causing the rods 8 to riseout of their proper positions, the ends of the arms will be elevated andthe dog 30 will be swung into the path of the teeth 32 on sleeve 27, asshown in Figs. 4, 6, and 13. This will cause the arrest of sleeve 27,and the continued rotation of the collar 25 will force sleeve 27outwardly and bring the key 20 into its intermediate position, (shown inFig. 11,) thereby disconnecting gear 15 from shaft 14 and causing thepattern-cylinders to stop r0- tating. This action takes placeimmediately and before any of the other parts of the dobby can becomederanged. It is also timed by a proper relation of the teeth 32 to thedog 30 and its operating parts so as to occur between the cycles of theloom and when none of the harnesses or other parts are in the midst ofan incomplete movement. At any time when it is desired to do so the key20 may be pulled out by hand with the knob or handle 29 to theintermediate position, so as to stop the pattern-chains, and by stillfurther pulling it out to the outer position (shown in Fig. 12) thereversegear may be thrown in and the chains run backward.

The term pattern-chain employed in the claims includes anypatternsurface composed of links or having the general nature of achain.

I claim-- 1. In loom shedding mechanism, the combination of apattern-cylinder,a pattern-chain mounted thereon, and a device movableby radial displacement of the chain on the cylinder for stopping saidchain.

2. In loom shedding mechanism, the combination of a pattern-chain havinga series of selectors, a rotary propelling-support therefor, a series offeelers coacting with the chain opposite said support, and a devicemovable by displacement of the chain on said support for stopping thechain.

3. In loom shedding mechanism, the combination of a pattern-chain,chain-propelling mechanism, a member movable to throw said mechanism outof action, an oscillating finger movable by displacement of the chain, acam on the axis of said finger, and a sliding rod operated by said camand operatively connected to said member.

4. In loom shedding mechanism, the combination of a pattern-chain, chainpropelling mechanism, a normally rotating member adapted, when arrested,to throw said mech anism out of action, an arresting member, and adevice movable by displacement of the chain for throwing said arrestingmember into arresting position.

5. In loom shedding mechanism,'the com bination of a pattern-chain, adriving-shaft, a chain -propelling gear thereon, a key movable toconnect said gear with and disconnect it from the shaft, and meansoperated by displacement of the chain for throwing said key intodisconnecting position.

6. In loom shedding mechanism, the combination of a pattern-chain, adriving-shaft, a chain-propelling gear thereon, a key movablelongitudinally of the shaft to connect said gear with and disconnect itfrom the shaft, a cam member fixed to the shaft, a comconnects both ofsaid gears from the shaft, a handle on said key whereby it may he movedmanually into position to connect the reversing-gear and means operatedby displacement of the chain for moving the key into position todisconnect the other gear.

8. In a loom shedding mechanism, the combination of a pattern-chain,mechanism to operate the same, and a device for stopping the chain, saiddevice being unmoved during the normal running of the chain, but adaptedto be moved by the engagement of the chain therewith so as to stop thechain when the latter is displaced with respect to its operatingmechanism.

In testimony whereof I have atfixed my sig nature in presence of twowitnesses.

, JOHN WALTER PLATT.

Witnesses:

CHARLES E. KING, EDWARD H. FLAGG.

